donkey work

noun
1.
Informal. tedious, repetitious work; drudgery.
Also, donkeywork
[dong-kee-wurk, dawng‐, duhng‐] /ˈdɒŋ kiˌwɜrk, ˈdɔŋ‐, ˈdʌŋ‐/ (Show IPA)
.
Origin
1915-20
Slang definitions & phrases for donkeywork

donkeywork

noun

Tedious work needing little skill or wit; scut: He uses computers to do what the ''whiz kids'' call their ''donkey work'' (1920+)